Can We Blame Our Genes for Our Decisions?

The Crux
By Nathaniel Scharping
Dec 10, 2018 11:24 PMOct 15, 2019 6:13 PM
genetic data
(Credit: Zita/Shutterstock)

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Forget meditation, forget ayahuasca ceremonies and mindfulness practice. Today, knowing yourself is as easy as swabbing your cheek. Home genetics tests like those offered by 23andme are becoming readily affordable — just $69 for a test kit — and they offer an unprecedented look at our personal blueprint.

It’s even possible today to study the genetics of your potential offspring before they’re born. So-called pre-implantation genetic diagnosis analyzes DNA from an embryo when it’s nothing more than a few cells. Even at that stage it’s possible to divine the unique set of genes that will shape a person’s life.

The tests are currently used for parents at risk of passing on dangerous genetic conditions, but they could conceivably do much more. Studies have picked out groups of genes associated with intelligence, academic achievement, criminal activity and other life outcomes. It now seems possible to chart your children’s lives before they ever emerge into the world.

The implications are staggering. Knowing what kind of person a child is likely to become — a kind of scientific prejudice — could easily lead to discrimination. Kids with genes linked to low intelligence could be shunted into inferior schools, and adults with genes linked to criminal activity could be subjected to extra-judicial police scrutiny.

This kind of thinking can be termed “genetic determinism” — the idea that our genes conclusively shape our behavior — and it also wreaks havoc with our notions of morality and free will. If our genes are guiding our behavior, does that mean we’re not responsible? “It wasn’t my fault, officer, my genes made me do it”?

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